COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

Ram compression in turbojet involves

Compression of inlet air

Increasing speed of incoming air

Lost work

Reduction of speed of incoming air and conversion of part of it into pressure energy

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The blades of gas turbine are made of

Carbon steel

Stainless steel

High nickel alloy

High alloy steel

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A machine used to raise the pressure of air is called

Air motor

I.C engine

Gas turbine

Compressor

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The air power of the compressor is also known as

Frictional power

Brake power

None of these

Indicated power

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The stagnation pressure rise in a centrifugal compressor takes place

In the diffuser and impeller

In the inlet guide vanes only

In the diffuser only

In the impeller only

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Producer gas is produced by

Carbonisation of coal

Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

Passing air and a large amount of steam over waste coal at about 65°C

Passing steam over incandescent coke

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An air compressor may be controlled by

Throttle control

Blow off control

Clearance control

Any one of the above

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Out of the following, from where you will prefer to take intake for air compressor

From coal yard side

From outside atmosphere at 1°C

From an air conditioned room maintained at 20°C

From a side where cooling tower is located nearby

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Pick up the false statement

Exhaust losses in gas turbine are high due to large mass flow rate

Overall efficiency of gas turbine plant is lower than that of a reciprocating engine

Gas turbine is a self starting unit

Gas turbine does not require huge quantity of water like steam plant

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A rocket works with maximum overall efficiency when air craft velocity is equal to the

Jet velocity

Twice the jet velocity

Average of the jet velocity

Half the jet velocity

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